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Antennas : Theory- Quarter Waves and Velocity Factor
- Coax Velocity Factor in Baluns, Does it Matter?
Test results show coaxial cable velocity factor does not always enter into stub length calculations especially in the world of Baluns
[ Hits: 208 | Votes: 0 | Rating: 0 ]
- Live DX Cluster M0NWK
- View real-time spot information by band for active amateur radio operators around the world via the DX Cluster network, taking raw data from a JSON API made available by DXCluster.co.uk
[ Hits: 301 | Votes: 0 | Rating: 0 ]
- CQ World Wide VHF Contest
- Official web site of the CQ World Wide VHF Contest
The contest promotes VHF activity on the 6 and 2 meter bands with participation from around the world.
[ Hits: 183 | Votes: 0 | Rating: 0 ]
- West Texas Amateur Radio Association
- As a ham radio club we get involved with contest, emergency response and services (CERT, RACE, ARES & etc), volunteering to organizations that needs our help (Community, Boys Scouts, Senior Citizens, & etc.), promoting and educating individuals of amateur radio operations (ARRL, FCC, Obtaining Licenses, Local Government, & etc), meeting new and interesting people around the world and beyond through many sources (VHF, UHF, HF, Computers, CW, D-Star, RTTY, & etc.), amateur radio is a great social skill, there is no age limit on who can get involved, and much more.
[ Hits: 212 | Votes: 0 | Rating: 0 ]
- SPE Electronics
- Makers of the worlds smallest automatic solid state HF amplifier Expert 1K-FA, Expert 2K-FA and Expert 1.3K-FA
[ Hits: 360 | Votes: 0 | Rating: 0 ]
- DV Access Point Dongle
- The DV Access Point Dongle connects to your PC or Intel based Mac via a USB port and provides a 2 meter Access Point for use with a D-STAR radio. Using an Internet connection, a user may connect to and communicate with D-STAR gateways and reflectors around the world
[ Hits: 177 | Votes: 0 | Rating: 0 ]
- Duracomm Power Supplies
- Power Solutions for Durable Communication Systems. Founded in Sep. 1992, DuraComm Power Supplies is a worldwide recognized leader in ultra-reliable AC-to-DC switch mode power supplies commonly used in the communications industry.
[ Hits: 139 | Votes: 0 | Rating: 0 ]
- iotamaps - IOTA mapping project
- iota mapping project - a mapping resource for the IOTA (Islands On The Air) award program
[ Hits: 494 | Votes: 11 | Rating: 9.73 ]
- Codes of the World
- History of codes of the world, russian codes, visual codes, and al long collection of telegraph codes as used worlwide including the international morse code and the relative variations
[ Hits: 985 | Votes: 0 | Rating: 0 ]
- HF Bands
- A review of the HF ham radio bands, considere by far the most popular bands in the amateur service. HF bands offer local QSOs and world-wide propagation are all possible at almost anytime with careful selection of the right frequency for the time of day, time of year, and current state of the sunspot cycle.
[ Hits: 372 | Votes: 1 | Rating: 10 ]
- NAQCC
- North american QRP CW Club, open to any licensed radio amateur or shortwave listener (SWL) worldwide with at least some interest in CW/QRP operation. Encouraging the use of CW and helping all hams increase CW speed and proficiency
[ Hits: 326 | Votes: 0 | Rating: 0 ]
- TW4040 Manual
- PDF manual of the TW4040 The Adventurer MonobanderTM
TransWorld Antennas
[ Hits: 629 | Votes: 0 | Rating: 0 ]
- TransWorld TW2010L Review
- A brief review of the TW2010L Backpacker Antenna. This is a portable vertical antenna covering 10,12,15,17 and 20m
[ Hits: 420 | Votes: 2 | Rating: 9.5 ]
- TW2010L Manual
- TW2010L The Adventurer Lite TransWorld Antennas
instruction manual PDF file
[ Hits: 461 | Votes: 2 | Rating: 5 ]
- Trans World Antenna setup
- A video domonstrating how fast can be the
setup of a Trans World Antenna
[ Hits: 619 | Votes: 1 | Rating: 1 ]
- DX Maps
- Amateur Radio World Prefix Map, custom great circle maps and more. Map printing service based in the UK
[ Hits: 391 | Votes: 0 | Rating: 0 ]
- aprs.fi for iPhone and iPad
- Official aprs.fi iOS app, immediate real-time visibility to APRS traffic near you and around the world.
[ Hits: 434 | Votes: 2 | Rating: 5.5 ]
- My LoTW
- My LoTW is a free viewer app for Logbook of the World by ARRL. Features include, View all the QSOs you have submitted to LoTW, Add multiple callsigns under your LoTW account, View all your QSLs, Share digital QSL image which is created by the app for QSLs. Either save it on your device or share it on facebook, View statistics for your worked stations/DXCC/bands etc
[ Hits: 348 | Votes: 2 | Rating: 6 ]
- How Common Mode Chokes Work
- Examine the function and operation of a common mode choke and the way it reduces unwanted interference. Common Mode Choke vs. Single Choke
[ Hits: 736 | Votes: 2 | Rating: 10 ]
- RF Standards and Regulations
- There are many different RF safety standards and regulations used throughout the world, here are discussed: US FCC regulations, IEEE standard, Canadian Safety Code 6 and International Council on Non-Ionizing Radiation Protection
[ Hits: 159 | Votes: 0 | Rating: 0 ]
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